The museum initially opened in Saint Irene Church initially. Later in 1950, it was moved to the First Army Headquarters building in Cumhuriyet Caddesi in Harbiye district. Istanbul Military Museum is situated inside an old Ottoman building known as maktab-e Harbie. It used to educate the military officer but now this two storey building is a military museum. In Turkish language it is known as Askeri Muze.
Ottoman bronze cannon
This cannon was used during the Siege of Constantinople in 1453. A gun maker from, then Kingdom of Hungary (modern day Brasso, Romania) made this supergun for the Ottoman Sultan Mehmed II.